package cn.gjxblog.thread.example.count;

import cn.gjxblog.thread.annotations.NotThreadSafe;
import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

/**
 * @author gjx
 * @version v1.0
 * @Description
 * @date 2019/7/1 10:59
 */
@Slf4j
@NotThreadSafe
public class CountExample1 {

    //请求总数
    public static  int clientTotal = 5000;

    //同时并发执行的线程数
    public static  int threadTotal = 200;

    public static  int count = 0;

    public static void main(String[] args) throws InterruptedException {
        ExecutorService executorService = Executors.newCachedThreadPool();
        //信号量
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);

        for(int i = 0; i < clientTotal; i++){
            executorService.execute(()->{
                try {
                    semaphore.acquire();
                    add();
                    semaphore.release();
                } catch (InterruptedException e) {
                    log.error("exception",e);
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
        log.info("count:{}",count);
    }

    private static void add() {
        count++;
    }
}
